COMMERCIAL SEPTIC SYSTEM
INSTALLER GRADE A+ COMPLETE
EXAM QUESTIONS AND 100% VERIFIED
ANSWERS (2026/2027) PASS
GUARANTEE
AllCtanksCmustChave:C-CCORRECTCANSWER2Ccompartments
AllCtanksCwhetherCpre-
manufacturedCorCconstructedConCsiteCshallCbeCconstructedCsoCthatCtheClengthCisC___________Cco
mparedCtoCtheCwidth.C-CCORRECTCANSWERatCleastConeCandCone-
ChalfC(1C1/2)Ctimes...C"toCtheCwidth."
SepticCTanksCmayCbeCmadeCof:C-
CCORRECTCANSWERConcrete,CPlastic,Cfiberglass,CorCotherCmaterialsCasCapprovedCbyCtheCdepartme
nt.
TankCcompartmentCpartitionsCwillCbeClocated:C-CCORRECTCANSWERNotClessCthanCtwo-
thirdsCorCmoreCthanCthree-fourthsCtheCLengthCofCtheCtankCfromCtheCInletCend.
CompartmentCpartitionsCwillCbeCconstructedCsoCaCpass-
thruCholeCorCslotCequalCtoCorCgreaterCthanCtheCdiameterCofCtheCinletCpipeCisCpositionedCbelowCtheCli
quidCsurfaceCwithCaC_____________________________.C-
CCORRECTCANSWERMinimumC25%CtoCaCmaximumCofC50%CofCtheCtotalCliquidCdepth.
TotalCliquidCdepthCforClargerCpoured-in-
placeCtanksCshallChaveCaCmaximumCofC______________inchesC-CCORRECTCANSWER66Cinches
, TrueCorCFalse:CWallsCandCbottomCofCpoured-in-placeCsepticCtanksCmustCbeCreinforced.C-
CCORRECTCANSWERTrue
HowCcanCaCSepticCtankCbeCreinforced?C-
CCORRECTCANSWERsixCinchCbyC6CinchC(6"x6")CNo.10CgageCweldedCsteelCreinforcingCwireCORCfibrou
sCreinforcingCmaterialCconformingCtoCASTMCspecificationsCforCsuchCmaterials.
HowCmustCTankCLidsCbeCReinforced?C-CCORRECTCANSWERusingCthree-
eightsCsteelCreinforcingCrodsC(rebar)CwhichCshallCbeCspacedCtwelveCinchesC(12")ConCcenterCeachCwa
yCextendingCaCminimumCofCtwoCandConeChalfC(2C1/2")CinchesCandCaCmaximumCofCthreeC(3")CfromCt
heCoutsideCedgeCofCtheCtankClid.
InCgeneral,CtheCtankCmustCbeCableCtoCwithstandCaCuniformCliveCloadCofC______________________C
poundsCperCsquareCfootCinCadditionCtoCallCloadsCtoCwhichCanCundergroundCtankCisCnormallyCsubject
ed.C-CCORRECTCANSWER150
TrueCorCFalse:CWalls,Cbottoms,CandClidsCofCpoured-in-
placeCsepticCtanksCshouldChaveCaCminimumCthicknessCofCfourCinchesC(4").C-
CCORRECTCANSWERTrue
TankClidsCshallCbeCconstructedCinC______________________CpiecesCandCshallChaveCsecurable,Crem
ovableCaccessCopeningsClocatedCsoCthatCtheCinletCandCoutletCteesCcanCbeC____________________
____________.C-CCORRECTCANSWERoneCorCtwo,C
readilyCaccessed.
AccessCopeningCshallChaveCaCminimumCofC_________________CandCmaximumCofC_____________
______CfreeCspace.C-CCORRECTCANSWERMinimum:C15"
Maximum:C24"
INSTALLER GRADE A+ COMPLETE
EXAM QUESTIONS AND 100% VERIFIED
ANSWERS (2026/2027) PASS
GUARANTEE
AllCtanksCmustChave:C-CCORRECTCANSWER2Ccompartments
AllCtanksCwhetherCpre-
manufacturedCorCconstructedConCsiteCshallCbeCconstructedCsoCthatCtheClengthCisC___________Cco
mparedCtoCtheCwidth.C-CCORRECTCANSWERatCleastConeCandCone-
ChalfC(1C1/2)Ctimes...C"toCtheCwidth."
SepticCTanksCmayCbeCmadeCof:C-
CCORRECTCANSWERConcrete,CPlastic,Cfiberglass,CorCotherCmaterialsCasCapprovedCbyCtheCdepartme
nt.
TankCcompartmentCpartitionsCwillCbeClocated:C-CCORRECTCANSWERNotClessCthanCtwo-
thirdsCorCmoreCthanCthree-fourthsCtheCLengthCofCtheCtankCfromCtheCInletCend.
CompartmentCpartitionsCwillCbeCconstructedCsoCaCpass-
thruCholeCorCslotCequalCtoCorCgreaterCthanCtheCdiameterCofCtheCinletCpipeCisCpositionedCbelowCtheCli
quidCsurfaceCwithCaC_____________________________.C-
CCORRECTCANSWERMinimumC25%CtoCaCmaximumCofC50%CofCtheCtotalCliquidCdepth.
TotalCliquidCdepthCforClargerCpoured-in-
placeCtanksCshallChaveCaCmaximumCofC______________inchesC-CCORRECTCANSWER66Cinches
, TrueCorCFalse:CWallsCandCbottomCofCpoured-in-placeCsepticCtanksCmustCbeCreinforced.C-
CCORRECTCANSWERTrue
HowCcanCaCSepticCtankCbeCreinforced?C-
CCORRECTCANSWERsixCinchCbyC6CinchC(6"x6")CNo.10CgageCweldedCsteelCreinforcingCwireCORCfibrou
sCreinforcingCmaterialCconformingCtoCASTMCspecificationsCforCsuchCmaterials.
HowCmustCTankCLidsCbeCReinforced?C-CCORRECTCANSWERusingCthree-
eightsCsteelCreinforcingCrodsC(rebar)CwhichCshallCbeCspacedCtwelveCinchesC(12")ConCcenterCeachCwa
yCextendingCaCminimumCofCtwoCandConeChalfC(2C1/2")CinchesCandCaCmaximumCofCthreeC(3")CfromCt
heCoutsideCedgeCofCtheCtankClid.
InCgeneral,CtheCtankCmustCbeCableCtoCwithstandCaCuniformCliveCloadCofC______________________C
poundsCperCsquareCfootCinCadditionCtoCallCloadsCtoCwhichCanCundergroundCtankCisCnormallyCsubject
ed.C-CCORRECTCANSWER150
TrueCorCFalse:CWalls,Cbottoms,CandClidsCofCpoured-in-
placeCsepticCtanksCshouldChaveCaCminimumCthicknessCofCfourCinchesC(4").C-
CCORRECTCANSWERTrue
TankClidsCshallCbeCconstructedCinC______________________CpiecesCandCshallChaveCsecurable,Crem
ovableCaccessCopeningsClocatedCsoCthatCtheCinletCandCoutletCteesCcanCbeC____________________
____________.C-CCORRECTCANSWERoneCorCtwo,C
readilyCaccessed.
AccessCopeningCshallChaveCaCminimumCofC_________________CandCmaximumCofC_____________
______CfreeCspace.C-CCORRECTCANSWERMinimum:C15"
Maximum:C24"